Microsoft Office Online Server/Office Web Apps cross site scripting

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CVSS Meta Temp Score
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4.6$0-$5k0.00

A vulnerability was found in Microsoft Office Online Server and Office Web Apps (Office Suite Software) (version unknown). It has been classified as problematic. Affected is an unknown part. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. This is going to have an impact on integrity. An attacker might be able to inject arbitrary html and script code into the web site. This would alter the appearance and would make it possible to initiate further attacks against site visitors. CVE summarizes:

A spoofing vulnerability exists when an Office Web Apps server does not properly sanitize a specially crafted request, aka 'Office Web Apps XSS Vulnerability'.

The weakness was disclosed 07/14/2020 as confirmed security update guide (Website). The advisory is available at portal.msrc.microsoft.com. The public release has been coordinated in cooperation with the vendor. This vulnerability is traded as CVE-2020-1442 since 11/04/2019. It is possible to launch the attack remotely. A authentication is necessary for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project. The advisory points out:

A spoofing vulnerability exists when an Office Web Apps server does not properly sanitize a specially crafted request. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected Office Web Apps server. The attacker who successfully exploited this vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

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VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.6

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔒

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VulDB Base Score: 🔒
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Exploitinginfoedit

Class: Cross site scripting
CWE: CWE-79
ATT&CK: T1059.007

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

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Current Price Estimation: 🔒

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Recommended: Patch
Status: 🔍

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Timelineinfoedit

11/04/2019 CVE assigned
07/14/2020 +253 days Advisory disclosed
07/14/2020 +0 days Countermeasure disclosed
07/15/2020 +1 days VulDB entry created
10/29/2020 +106 days VulDB last update

Sourcesinfoedit

Vendor: https://www.microsoft.com/

Advisory: portal.msrc.microsoft.com
Status: Confirmed
Coordinated: 🔒

CVE: CVE-2020-1442 (🔒)

Entryinfoedit

Created: 07/15/2020 09:13 AM
Updated: 10/29/2020 04:16 PM
Changes: (1) source_cve_assigned
Complete: 🔍

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